Printing press



W. H. SMITH.

PRINTING PRES-S.

APELICATION FILED MAR.26,1921.

1,404,554. Patent-ed UNITED STATES PATENT OFFICE.

WALTER E. SMITH, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO MILLER SAW- TRIMMER COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

PRINTING PRESS.

Application filed March 26, 1921.

To all whom it may concern.

Be it known that I, WALTER H. SMITH, a subject of the King of Great Britain, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Printing Presses, of which the following is a specification.

My invention pertains to printing presses, and relates especially to devices for maintaining the sheets, fed forward for being received by the impression member, in position in proper contact with the press guides. The principal object of my invention is to provide an efficient means for preventing rebounding of the sheet when the latter is brought forward to contact with the press uides, for preventing movement of the ront edge of the sheet away from the press guides when the sheet is moved sidewise, as in registering, and otherwise for maintaining the sheet securely in position with its front edge engaging t e press guides, so that proper end register will be obtained when the sheet is taken by the impression member and printed.

I have described, as an example, in the following specification, and shown in the accompanying drawing, an embodiment of my invention as applied to a cylinder press. Modifications and changes, however, may be made without exceeding the sco e of the invention, as defined in the appen ed claims.

In the drawing:

Fig. 1 is a sectional elevation showinga device constructed in accordance with my invention applied to a cylinder press;

Fig. 2 is a perspective view showing the press guide; and

Fig. 3 is a view showing the shape of brush I propose to employ.

Referring now to the drawing, 10 indicates the feed-board, terminating in a feedlate 11, of a cylinder press, the cylinder eing designated as 12. Above the cylinder is mounted the usual rock shaft 13 which carries a support 14 for a press guide. Usually two press guides are provided, each cooperating with a guide-tongue 15 extending forward from beneath the feed-board 10. In ordinar operation, the sheet is fed forward unti its front part rests upon the tongues 15, with the front edge engaging Specification of Letters Patent.

Patented Jan. 24, 1922.

Serial No. 455,946.

against the press guides, when it is in correct register position to be seized by the cylinder grippers. In practice, however, it is easy for the sheet to spring back from the press guides, especially when fed forward by a rapidly moving automatic device. Also, where the sheet, after being fed against the press guides, is moved sidewise, to effect side registering, its front edge will sometimes leave its close engagement with one of the press guides, whereby proper front register is destroyed. Springs, brushes and ot or sheet engaging members have been employed for maintaining the sheet in close engagement with the press guides; but they have not been entirely successful in obviating the difiiculties referred to.

According to my invention, I provide, on each support 14, in place of the usual press guide, a uide 16 having formed therein a slot 17. his slot is so formed as to leave shoulders 18 adapted to rest on the tongue 15. On a rod 19, extending across the feedboard, or other suitable support, I provide, opposite each press-guide, a clip 20 having a downwardly extending arm 21 to which is pivoted a socket 22. In the socket 22 is mounted, so as to be longitudinally adjustable therein, the stem 24 of a brush 23, The brush 23 rests by gravity on the tongue 15, and is cut slanting so that its lower face lies evenly on said ton ue. The parts are so arranged that the rush 23 extends partly into the slot 17 of the corresponding press guide 16. The sheet 25 fed to the press guides 16 is engaged by the brushes 23 from above, and is e d by them in engagement with the press guides.

By the above-described construction, there is provided a brush engagement on the sheet which is effective up to the extreme edge at which the sheet on ages the pressguides. This is especially advantageous in maintaining the sheet-edge in engagement with the press guides during a side-registering movement. The brushes rest on the tongues 15 lightly enough to oppose no appreciable resistance to the feeding of the sheet to the press guides. They present, however. enou h resistance to sidewise movement of the s eet, during side-registering, to smooth out any longitudinal wrinkles which may occur. The provision of the brushes at the guide tongues has the further advantage ton ue and extending partially through said that they maintain the sheet against movement during the short period betx'veen the time the press-guides rise and the time the sheet is finally seized by the cylinder grippers. 4

Having thus fully described my said invention, What I claim as new, and desire to secure by Letters Patent, is:

1. The combination With a press guide and guide tongue of a brush contacting said gui e.

2. In combination, a guide tongue, a press uide cooperating with said tongue and 15 rmed with a slot therein, and a brush 00- operating with said tongue and having a part thereof extending into said slot.

WALTER H. SMITH. Witness:

CHARLES G. COPE. 

